Java generics, Unbound wildcards <?> vs <Object>

Question

I\'ve read a few topics which cover certain questions about generics, such as their relationship with raw types. But I\'d like an additional explanation on a certain line fo

Answer 1

The sentence that is confusing you is trying to warn you that, while List is the super-type of all generic lists, you cannot add anything to a List collection.

Suppose you tried the following code:

private static void addObjectToList1(final List aList, final Object o ) {
    aList.add(o);
}

private static void addObjectToList2(final List